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Photocatalytic hydrogen production on Pt-loaded TiO2 inverse opals

Paper ID Volume ID Publish Year Pages File Format Full-Text
44898 46375 2015 7 PDF Available
Title
Photocatalytic hydrogen production on Pt-loaded TiO2 inverse opals
Abstract

•TiO2 inverse opals and macroporous TiO2 were used in H2 production experiments.•Inverse opals show higher rates due to slow photons.•Polymer template influences the crystallinity and the performance of TiO2 samples.•No evidence for faster electron transfer in TIOs during H2 photoproduction.•Inverse opals are effective both on oxidation and reduction photocatalytic reactions.

TiO2 inverse opals present increased photocatalytic production of H2. TiO2 inverse opals with different pore size and TiO2 macroporous structures with disordered arrangement of the pores have been tested in the photocatalytic production of hydrogen in aqueous solution with a formate buffer as hole scavenger. TiO2 inverse opals belong to the family of metamaterials and exhibit unique catalytic properties arising from their peculiar interaction with light. To discriminate the effects of slow photons the hydrogen photoproduction experiments were carried out at two different wavelengths, at 365 nm where the effect of slow photons is maximized, and at 254 nm where it is negligible. The resulting hydrogen production rates suggest a strong effect of the slow light and of the polymer template used in the synthesis of the TiO2 powders. The chemical properties of the polymeric sacrificial template determine the crystalline phase of the sample and as a consequence affect the catalytic performances of the resulting TiO2 structures.

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Keywords
PBG, photonic band gap; TIO, TiO2 inverse opal; MP, macroporous; XRD, X-ray diffraction; PMMA, polymethylmethacrylate; PS, polystyreneTiO2; Inverse opal; Hydrogen production; Slow light; Slow photons
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Photocatalytic hydrogen production on Pt-loaded TiO2 inverse opals
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 163, February 2015, Pages 452–458
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us